I think William Hill have £25 limits on these WWE markets now due to how volatile and privy to inside information/absolute shenanigans these kind of bets are.

I'm amazed they allow betting on it at all. It's not a sport, it's more like betting on what the next plot will be in a movie or TV series - someone wrote it and a certain number of people will know the outcome.

It's possibly that bookies expect that these 'casual' punters drunk on their winnings will then reinvest it trying to win more money in the hope that they promptly lose it straight back...a kind of 'loss leader' if you will.

I'd guess there are plenty of phantom accounts being set up 'all the time' solely to bet on things like these then swiftly not used much.

They are essentially betting that there will be more uninformed punters gambling/ guessing than people with inside information. Most likely that is true, but it seems like a risk given that there must be a fairly big circle of people who know exactly what the outcome will be.